Good point Wrenchbender. I failed to notice a 230 came out in 1962. Resistance wire was indeed used in that period on GM. I never asked the year. I also did not know that a ballast resistor was "added". Was assuming it was original to the truck. I have some 55-59 GMC schematics with N as Violet.
In this probable era, GM was switching to alternators/sensing wire/resistance wire/idiot lights........
Resistance wire was the new ballast resistor and has to be a certain length.
I completely blew it on this one.
"it has an inner sleeve and then wraped with a woven cloth, maybe fiberglass." That is resistance wire. If I knew what year vehicle I could study about it. Maybe you told? Don't see it. You don't want both, as WB said and as you found but didn't know what you found maybe.
I don't follow post 1221031, not even a little. I don't understand the symptom/diagnosis/analysis. I do follow you got it running.
Your idea to rewire that section is spot on. If you abandon the resistance wire, you can use a ballast resistor the old fashioned way.
